Question

Question 5

Blood pressure measurements consist of two numbers, the systolic pressure and the diastolic pressure. Subjects taking an experimental blood pressure medicine had the following measurements:

Systolic 134 115 113 123 119 118

Diastolic 70 83 77 77 69 75

Compute the correlation coefficient. Round your answer to three decimal places. Write only a number as your answer.

Question 6

The following table presents the test scores on the first (x) and second (y) exams in a Biology class.

x 45 54 45 55 59 49

y 44 56 46 64 69 57

The least-squares regression line is in the form y = b0 + b1x. Compute the value of b1. That is, compute the slope. Round your answer to two decimal places. Write only a number as your answer.

Question 7

The following table number of absences (x) and the grade earned on the first exam (y) for a Statistics class.

x 3 5 2 6 5 8

y 95 76 91 54 84 39

The least-squares regression line is in the form y = b0 + b1x. Compute the value of b0. That is, compute the intercept. Round your answer to two decimal places. Write only a number as your answer.

Answer 1